Slotting-machiwe



STATE$ P T OFFICE.

, PARLEY \VILLIAMS, 2D, OF BARRE, MASSACHUSETTS.

S LOTTING-MACH INE.

Specification of Letters Patent No, 10,873, dated May 2, 1854.

To all whom it may concern: l

Be it known that I, PARLEY 'WmnIAi-rs, 2d, of Barre, in the county of Worcester and State of Massachusetts, have invented a new and useful improvement in slotting-ma chinesfor cutting keyways in the hubs of wheels, pulleys, and all articles requiring to be keyed to shafts or for slotting operations of a similar nature; and I'do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings,

forming part in which-- Figure 1, is a front elevation of a machine, constructed according to my invention. Fig. 2,is avertical section through the center of the same, at right angles to Fig. 1. Fig. 3, is a top view of the column containing the tool and the feeding devices. Fig. 4, is a front view of the top part of. the tool stock, and the lower part of the tool, showing the meansof attachment.

Similar letters of referenceindicate corresponding parts in the several figures.

This invention relates to a certain means of this specification,

of holding the wheel or other article to be slotted,and of attaching, feeding, and controlling the operation of the cutting tool.

A, is a table supported upon, standards, B, B, and carrying an upright column, G, which is firmly secured to it. The lower part of this column is bored out to receive the solid piston, D, which fits easily therein, and forms the tool stock. The tool stock is attached by a connecting rod, E, to a stud, a, on the face of a spur wheel, F, on a shaft, G, which rests in bearings on the standards which support the table. The spur wheel, F, gears with a smaller spur wheel, H, on a shaft, 1, which is supported in bearings above the shaft, G, and is the driving shaft of the machine. The driving shaft communicates motion to the shaft, G, by the gearing, and the stud, a, forming the equivalent -of a crank, gives a vertical reciprocating motion to the tool stock. The tool, J, is attached to the tool stock by means of a knob, or button, 6, at thebot-tom, which slides into a slot, 0, in the top of the tool stock. This slot, for about half way across from the front of the stock, has a narrow mouth, 6, see Fig. 4, which prevents the knob or button, 6, being withdrawn upward, but the other half has its mouth wide,

as shown in dotted lines, cl, cl, in Fig. 4, so

that it will allow the button to pass up, and the tool to be taken out. This method of attaching the tool allows it to move back and forth horizontally in the machine far enough for the purpose of feeding it toits work, and allows itto be easily taken .from the machine when necessary, by simply sliding the knob or button, Z), back to the wide mouthed part of the slot, (1. intended to cut downward; it is made of As the tool is hooked form. The cutting edge is made of l the full width of the intended slot, so that lit will cut the whole width at once. The

1 length of the tool is such, that at the lowest point in its stroke, the cutting edge is just below the top of the column, A. The tool has a spring, Z, in f'ronta short distance be-. low the cutting edge, the effect of which will be hereinafter described. The column has a slot, is, inside, for the tool to work in.

The upper part of the column receives an adjustable cylindrical mandrel, K, which is secured in place by a binding screw, f, and protrudes some distance above the top of the column. The front side of this mandrel has a slot, 9, along its whole length, in which the toolwo-rks, and at the back of this slot it is cut away to receive a wedge, h, which bears against the back of the tool, with its point downward. This wedge has a lug, 2', on one side of its head, in which is a female screw to receive an upright male screw, j, whose point rests upon the top of the mandrel.

The wheel or other article requiring a slot cut in it is placed over themandrel, K, which must be smaller than its bore, and is supported on the top of the column. It is keyed fast to the mandrel by a key, L, at the back so as to draw it close to the front of the mandrel where the tool works. A wheel is represented in Figs. 2, and 3, in red color, in place for being operated upon. The action of the wedge, h, when not supported by the screw, j, is to descend by its own weight, and feed the tool forward toward its work. The descent of the wedge is regulated by the screw, 7', which 1 supports it during the time the tool is cutting and prevents any further feed taking place after the out has commenced. Every time the tool ascends, the screw requires to be turned by hand in such a direction as to allow the wedge to fall far enough for the feed. The spring, Z, in front of the tool rests against the face of the bore, or against the face of that part of the slot which may have been already cut, and forces the tool into close contact with the wedge, and pre-' vents it overloading itself.

The reason for making the mandrel, K, detached and adjustable is, that mandrels of difl'erent sizes may be used to suit the hubs of difierent bores. The mandrel should only be so much smaller than the bore as is necessary to introduce the key, L, by which the hub is secured to it.

What I claim as my invention, and desire to secure by Letters Patent, is 1 1. The mandrel, K, secured in the top of the column which supports the hub, serving, with the aid of a key, to hold the hub in place, and containing a slot, 9, on the side in close contact with the hub, which serves as a guide for the tool while cutting the slot in the hub or other similar article, substantially as herein described.

2. The combination of the wedge, h, the screw, j, and the spring, Z, the wedge'being placed in a recess in the mandrel behind the tool, and serving to feed and hold the tool to its work, the screw being attached to the back against the wedge, and thus prevent it 1 overloading itself, all substantially as herein set forth.

8. Attaching the tool to its stock by a button or knob,-b, at the bottom of the tool, fitting loosely into a slot, 0, in the top of the tool stock, which has a mouth, 6, narrower. than the button, but which extends only partly across from the front of the stock, said slot being arranged in such a direction, and its narrow mouth being of such length, as to allow the tool while attached to the stock, to move back and forth as far as is required for the feeding opera tion, but to allow the tool to be withdrawn by moving it back beyond its most backward operative position, as herein set forth.

PARLEY WILLIAMS, 2D.

Vitnesses EDWIN Woons, I. F. CALDWELL. 

